... An almost equally complete about-face has been executed in regard to pneumonia. Prolonged and excessive exposure to cold may be the match that fires the mine, but we are absolutely certain that two other things are necessary, namely, the presence of the diplococcus, and a lowered and somewhat vitiated state of bodily resistance, due to age, overwork, underfeeding, ... — Preventable Diseases • Woods Hutchinson Read full book for free!
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